Crossword Genius

Outsize Saxon on a mountain (4)

Ross

I believe the answer is:

ossa

I'm a little stuck... Click here to teach me more about this clue!

'mountain' is the definition.
(I've seen this before)

'outsize saxon on a' is the wordplay.
'outsize' becomes 'os'.
'saxon' becomes 's' (this might be a standard abbreviation I've not previously seen).
'on' is a charade indicator (letters next to each other).
'os'+'s'+'a'='OSSA'

Can you help me to learn more?

(Other definitions for ossa that I've seen before include "To heap Pelion on -- is to compound difficulties" , "Legendary mountain" , "Greek mountains" , "So as to turn to bones" , "mountain in Thessaly" .)

I've seen this clue in the Sydney Morning Herald.
Want a hint initially instead of a full solution? Install my app